SHARK LONGLINE FISHERY IN TANJUNGLUAR-EAST LOMBOK
Abstract: Studies on artisanal
shark fisheries in Tanjungluar - East Lombok were conducted during the year
2001-2011 (except in 2003 and 2007). A sampling method called “rapid market
survey” method was employed to collect catch data from surface and bottom
longlines fishing, rapidly. Biological data and fisheries data were collected
during survey. Catch data for shark were also obtained from daily records
filled by TPI officers in Tanjungluar between 2009 and 2010. The results showed
that shark longline fishing was conducted every month. The trend of shark
catches relates to the number of fishing vessels, fishing ground, and weather
conditions at sea. The period between July and September is a transitional season
from East to West seasons. During this season, the wind strength is weakened
and a good fishing season for the fishers. The lowest catch occurs in January
(1.06 tonnes) and the highest catch in September with the total catch of 24.6
tonnes. Sharks caught by surface longline were dominated by Silky shark,
Carcharhinus falciformis (40-90%) with the size range of 100-125 cm. The catch
of bottom longline was mostly consisting of fish in mature condition that
dominated by Grey reef shark (Carcharhinus amblyrhynchos), Common black tip
shark (C. limbatus), Spot tail shark (C. sorrah), and Scalloped hammerhead
shark (Sphyrna lewini), with the size range of 125-200 cm, 170- 250 cm, 100-150
cm, and 170-300 cm, respectively. Surface longline fishing occurs in the
offshore waters in depth more than 200 m to 3000 m, whereas bottom longline
fishing is operated at a depth of 50-100 m around islands.
Keywords: Shark; longline
fishing; Tanjungluar; East Lombok
Author: Dharmadi, Ria Faizah,
Lilis Sadiyah
Journal Code: jpperikanangg130037
